Ranked by reliability — blends KO rate with how often each Pokémon is matched up.
#
Checker
Encounters
Reliability
KO Rate
01
Skarmory
SteelFlying
DEFENSIVE COUNTER
80.584
85.2%
dies 5.50%
▾
252+ Atk Arceus Shadow Claw vs. 252 HP / 252+ Def Skarmory: 45-54 (13.4 - 16.1%) -- possible 7HKO
02
Dondozo
Water
DEFENSIVE COUNTER
326.643
80.1%
dies 3.74%
▾
252+ Atk Arceus Extreme Speed vs. 252 HP / 252+ Def Dondozo: 90-106 (17.8 - 21%) -- possible 7HKO
03
Garganacl
Rock
DEFENSIVE COUNTER
94.446
77.0%
dies 7.18%
▾
252+ Atk Arceus Earthquake vs. 252 HP / 252+ Def Garganacl: 136-162 (33.6 - 40%) -- 32.3% chance to 3HKO after Leftovers recovery
04
Skeledirge
FireGhost
DEFENSIVE COUNTER
440.978
64.4%
dies 3.91%
▾
252+ Atk Arceus Earthquake vs. 252 HP / 252+ Def Skeledirge: 164-194 (39.8 - 47%) -- guaranteed 3HKO
05
Glalie
Ice
DEFENSIVE COUNTER
23.603
64.2%
dies 9.87%
▾
252+ Atk Arceus Extreme Speed vs. 252 HP / 252+ Def Glalie: 114-135 (31.3 - 37%) -- 77.9% chance to 3HKO
06
Zacian-Crowned
FairySteel
OFFENSIVE CHECK
899.829
63.6%
dies 2.77%
▾
+1 252+ Atk Zacian-Crowned Close Combat vs. 252 HP / 0 Def Arceus: 408-482 (91.8 - 108.5%) -- 50% chance to OHKO
07
Arceus-Water
Water
DEFENSIVE COUNTER
167.423
63.5%
dies 6.41%
▾
252+ Atk Arceus Extreme Speed vs. 252 HP / 252+ Def Arceus-Water: 87-103 (19.5 - 23.1%) -- possible 5HKO
08
Calyrex-Ice
PsychicIce
DEFENSIVE COUNTER
625.989
63.2%
dies 3.34%
▾
252+ Atk Arceus Shadow Claw vs. 252 HP / 252+ Def Calyrex-Ice: 86-102 (21.2 - 25.2%) -- 0.1% chance to 4HKO
09
Sneasler
FightingPoison
OFFENSIVE CHECK
125.63
59.6%
dies 7.31%
▾
252+ Atk Sneasler Close Combat vs. 252 HP / 0 Def Arceus: 368-434 (82.8 - 97.7%) -- guaranteed 2HKO
10
Gouging Fire
FireDragon
DEFENSIVE COUNTER
39.935
57.1%
dies 7.83%
▾
252+ Atk Arceus Earthquake vs. 252 HP / 252+ Def Gouging Fire: 144-170 (34.7 - 41%) -- guaranteed 3HKO
11
Koraidon
FightingDragon
OFFENSIVE CHECK
2,929.603
56.4%
dies 1.59%
▾
252+ Atk Orichalcum Pulse Koraidon Collision Course (133.3251953125 BP) vs. 252 HP / 0 Def Arceus: 560-660 (126.1 - 148.6%) -- guaranteed OHKO
12
Corviknight
FlyingSteel
DEFENSIVE COUNTER
427.474
55.9%
dies 4.12%
▾
252+ Atk Arceus Shadow Claw vs. 252 HP / 252+ Def Corviknight: 56-66 (14 - 16.5%)
13
Arceus-Poison
Poison
SOFT CHECK
57.696
54.3%
dies 9.19%
14
Ursaluna
GroundNormal
SOFT CHECK
143.09
53.8%
dies 6.99%
▾
252+ Atk Ursaluna Close Combat vs. 252 HP / 0 Def Arceus: 260-306 (58.5 - 68.9%) -- guaranteed 2HKO
15
Clefable
Fairy
SOFT CHECK
42.877
52.9%
dies 10.47%
▾
252+ SpA Clefable Moonblast vs. 252 HP / 252+ SpD Arceus: 88-105 (19.8 - 23.6%) -- possible 5HKO
16
Cloyster
WaterIce
SOFT CHECK
23.032
51.4%
dies 10.41%
17
Kingambit
DarkSteel
SOFT CHECK
342.535
50.8%
dies 4.61%
▾
252+ Atk Kingambit Low Kick (120 BP) vs. 252 HP / 0 Def Arceus: 252-298 (56.7 - 67.1%) -- guaranteed 2HKO
18
Great Tusk
GroundFighting
SOFT CHECK
26.831
49.9%
dies 9.65%
▾
252+ Atk Great Tusk Close Combat vs. 252 HP / 0 Def Arceus: 372-438 (83.7 - 98.6%) -- guaranteed 2HKO
19
Groudon
Ground
SOFT CHECK
75.662
48.6%
dies 7.91%
▾
252+ Atk Groudon Precipice Blades vs. 252 HP / 0 Def Arceus: 204-241 (45.9 - 54.2%) -- 54.3% chance to 2HKO
20
2,162.196
48.2%
dies 1.86%
▾
252+ Atk Arceus Extreme Speed vs. 252 HP / 0 Def Arceus: 117-138 (26.3 - 31%) -- guaranteed 4HKO
21
Necrozma-Dusk-Mane
PsychicSteel
SOFT CHECK
311.433
47.0%
dies 4.89%
▾
252+ Atk Necrozma-Dusk-Mane Sunsteel Strike vs. 252 HP / 0 Def Arceus: 178-210 (40 - 47.2%) -- guaranteed 3HKO
22
Urshifu-Rapid-Strike
FightingWater
SOFT CHECK
24.916
46.8%
dies 10.00%
▾
252+ Atk Urshifu-Rapid-Strike Close Combat vs. 252 HP / 0 Def Arceus: 368-434 (82.8 - 97.7%) -- guaranteed 2HKO
23
Arceus-Ground
Ground
SOFT CHECK
1,029.206
46.3%
dies 2.68%
▾
252+ SpA Earth Plate Arceus-Ground Judgment vs. 252 HP / 252+ SpD Arceus: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
24
620.694
46.1%
dies 3.44%
▾
252+ SpA Kyogre Water Spout (150 BP) vs. 252 HP / 252+ SpD Arceus in Rain: 286-337 (64.4 - 75.9%) -- guaranteed 2HKO
25
Arceus-Fairy
Fairy
SOFT CHECK
404.541
44.6%
dies 4.26%
▾
252+ SpA Pixie Plate Arceus-Fairy Judgment vs. 252 HP / 252+ SpD Arceus: 129-153 (29 - 34.4%) -- 3.1% chance to 3HKO
26
Terapagos
Normal
SOFT CHECK
153.836
44.1%
dies 6.80%
▾
0- SpA Terapagos Tera Starstorm vs. 252 HP / 252+ SpD Arceus: 52-63 (11.7 - 14.1%) -- possible 8HKO
27
Ursaluna-Bloodmoon
GroundNormal
SOFT CHECK
46.223
43.9%
dies 9.70%
▾
252+ SpA Ursaluna-Bloodmoon Blood Moon vs. 252 HP / 252+ SpD Arceus: 165-195 (37.1 - 43.9%) -- guaranteed 3HKO
28
Kyurem-Black
DragonIce
SOFT CHECK
235.724
43.6%
dies 5.54%
▾
252+ Atk Kyurem-Black Dragon Claw vs. 252 HP / 0 Def Arceus: 151-178 (34 - 40%) -- guaranteed 3HKO
29
Glimmora
RockPoison
SOFT CHECK
580.32
43.6%
dies 3.52%
▾
0- SpA Glimmora Power Gem vs. 252 HP / 252+ SpD Arceus: 63-75 (14.1 - 16.8%) -- possible 6HKO
30
Calyrex-Shadow
PsychicGhost
SOFT CHECK
6,070.532
41.8%
dies 1.10%
▾
252+ SpA Calyrex-Shadow Psyshock vs. 252 HP / 0 Def Arceus: 147-174 (33.1 - 39.1%) -- 99.8% chance to 3HKO
Ranked #4 with 40.03% usage. Sorted by reliability score.